Insights

Sustainability Focus Guernsey emphasizes sustainable practices and building a sustainable built environment, indicating opportunities to offer green design optimization, energy modeling, and sustainability certifications to clients across architecture, engineering, and planning projects.

Cybersecurity Services With a stated emphasis on cybersecurity solutions and recent CMMC services partnerships, there is a clear path to expand security assessments, governance, risk, and compliance offerings for architecture and critical infrastructure projects.

Cross Industry Expertise Guernsey operates across architecture, engineering, economic and management consulting, environmental and transportation planning, and IT/security, presenting opportunities to bundle multi-disciplinary services for complex, large-scale clients seeking integrated delivery.

Regional Growth Headquartered in Oklahoma City with global work across five continents suggests potential to cultivate both regional government and corporate clients while leveraging international capabilities for cross-border projects and public-private partnerships.

Strategic Partnerships Recent collaborations with HoganTaylor and Siemens indicate openness to co-delivery models and advisory partnerships, offering a gateway for joint pitches to target clients and expansion into new service lines such as electric grid strategy and advisory consulting.

Guernsey Tech Stack

Guernsey uses 8 technology products and services including iCIMS, AutoCAD, Amazon Web Services, and more. Explore Guernsey's tech stack below.

Media & News

Guernsey's Email Address Formats

Guernsey uses at least 1 format(s):
Guernsey Email FormatsExamplePercentage
First.Last@guernsey.usJohn.Doe@guernsey.us
98%
LastFirst@guernsey.usDoeJohn@guernsey.us
1%
F.Last@guernsey.usJ.Doe@guernsey.us
1%

Frequently Asked Questions

What is Guernsey's phone number?

Minus sign iconPlus sign icon
You can contact Guernsey's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Guernsey's stock symbol?

Minus sign iconPlus sign icon
Guernsey is a publicly traded company; the company's stock symbol is SIGB.L.

What is Guernsey's official website and social media links?

Minus sign iconPlus sign icon
Guernsey's official website is guernsey.us and has social profiles on LinkedIn.

How much revenue does Guernsey generate?

Minus sign iconPlus sign icon
As of July 2026, Guernsey's annual revenue is estimated to be $100M - $250M.

What is Guernsey's NAICS code?

Minus sign iconPlus sign icon
Guernsey's NAICS code is 54131 - Architectural Services.

How many employees does Guernsey have currently?

Minus sign iconPlus sign icon
As of July 2026, Guernsey has approximately 163 employees across 4 continents, including North AmericaEuropeAfrica. Key team members include Vice President Energy & Utility Solutions: H. A.President: H. G.President: J. B.. Explore Guernsey's employee directory with LeadIQ.

What industry does Guernsey belong to?

Minus sign iconPlus sign icon
Guernsey operates in the Architecture and Planning industry.

What technology does Guernsey use?

Minus sign iconPlus sign icon
Guernsey's tech stack includes iCIMSAutoCADAmazon Web ServicesSucuriMicrosoft SQL ServerMicrosoft 365KronosPiwik PRO Core.

What is Guernsey's email format?

Minus sign iconPlus sign icon
Guernsey's email format typically follows the pattern of First.Last@guernsey.us. Find more Guernsey email formats with LeadIQ.

When was Guernsey founded?

Minus sign iconPlus sign icon
Guernsey was founded in 1928.
Guernsey logo

Guernsey

Architecture and PlanningOklahoma, United States51-200 Employees

Guernsey is a mid-sized, multidisciplinary design and consulting firm based in Oklahoma City, Oklahoma. Founded in 1928, it operates on five continents and offers a broad mix of architecture, engineering, economic and management consulting, environmental and transportation planning, and cybersecurity services. The firm emphasizes sustainability and aims to improve the built environment through integrated, cross-disciplinary work, and it is fully owned by its employees, reflecting an entrepreneurial, culture-driven approach. Guernsey serves clients across diverse industries with planning, design, and advisory capabilities that address complex infrastructure needs. Recent developments include collaborations with Siemens on electricity strategy, with HoganTaylor LLP to expand cybersecurity maturity services, and a city planning engagement with the City of Cushing.

Section iconCompany Overview

Phone number
Stock Symbol
SIGB.L
NAICS Code
54131 - Architectural Services
Founded
1928
Employees
51-200

Section iconFunding & Financials

  • $100M - $250M

    Guernsey's revenue is estimated to be in the range of $100M - $250M

Section iconFunding & Financials

  • $100M - $250M

    Guernsey's revenue is estimated to be in the range of $100M - $250M

Ready to create more pipeline?

Get a demo and discover why thousands of SDR and Sales teams trust
LeadIQ to help them build pipeline confidently.

© LeadIQ, Inc. All rights reserved.